CYBOP 0.28.0

CYBOL

Add cybol operations "calculate/increment", "calculate/decrement"
Use two operands for increment and decrement, just like for all other cybol calculate operations
Rename cybol operation "modify/lower" into "modify/lowercase" and use noun "lowercaser"
Rename cybol operation "modify/upper" into "modify/uppercase" and use noun "uppercaser"
Add container function taken from clojure language as cybol operation "modify/shuffle"
Add cybol operations "flow/loop-times", "flow/loop-for", "flow/loop-each"

Add cybol application "app/addition/increment/"
Add cybol application "tools/manual-generator/"
Add cybol applications "loop", "loop-times", "loop-for", "loop-each_map", "loop-each_reduce" to directory "app/control_flow/"

Fix cmake warnings
Fix venv issue in python scripts for cybol api generator
Remove github dependency in directory "build/scripts/"
Add python script files for api generation to cybop's git repository at gnu savannah